Patents by Inventor Sadao Takakuwa

Sadao Takakuwa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the production of 2,3-dichloro-1-propanol
    Patent number: 4788351
    Abstract: Improved process for the production of 2,3-dichloro-1-propanol in high yield by chlorinating allyl alcohol with chlorine, which is characteristic in that the chlorination reaction proceeds by introducing simultaneously allyl alcohol and chlorine gas and optionally hydrogen chloride gas into the reaction system containing aqueous hydrochloric acid without necessity of extreme cooling and/or pressure.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: November 29, 1988
    Assignee: Osaka Soda Co., Ltd.
    Inventors: Sadao Takakuwa, Tetsuya Nakada, Keishiro Nagao
  • Diallyl terephthalate copolymer and composition comprising said copolymer
    Patent number: 4518764
    Abstract: A diallyl terephthalate copolymer derived from diallyl terephthalate represented by the following formula ##STR1## and an aromatic hydrocarbon having at least one hydrogen atom at the benzyl position and represented by the following formula ##STR2## wherein each of R.sup.1 and R.sup.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: May 21, 1985
    Assignee: Osaka Soda Co. Ltd.
    Inventors: Motomu Tanaka, Masanari Osuka, Takeshi Kuri, Sadao Takakuwa